internal LightExpression<Func<TotemEngine, IDynamicMetaObjectProvider, object>> ParseExprToLambda(SourceUnit sourceUnit)
{
bool isExpression;
var ast = new Parser().ParseExpression(sourceUnit, out isExpression);
if (ast == null)
return null;
var scope = new AnalysisScope.TopLevel(
this,
Expression.Parameter(typeof(TotemEngine), "totemRuntime"),
Expression.Parameter(typeof(IDynamicMetaObjectProvider), "global"));
var ret = Expression.Variable(typeof(object), "#__returnVariable");
List<Expression> body = new List<Expression>();
var b = AstGenerator.Generate(ast, scope);
body.Add(Expression.Assign(ret, Expression.Convert(b, typeof(object))));
if (sourceUnit.Kind == SourceCodeKind.InteractiveCode)
{
if(isExpression) body.Add(Expression.Call(typeof(Console).GetMethod("WriteLine", new[] { typeof(object) }), ret));
body.Add(Expression.Call(typeof(Console).GetMethod("WriteLine", Type.EmptyTypes)));
body.Add(ret);
}
var moduleFun = Utils.LightLambda<Func<TotemEngine, IDynamicMetaObjectProvider, object>>(
typeof(object),
Expression.Block(new ParameterExpression[] { ret }, body),
"_snippet_",
new List<ParameterExpression>() { scope.RuntimeExpr, scope.GlobalExpr }
);
//var moduleFun = Expression.Lambda<Func<TotemEngine, IDynamicMetaObjectProvider, object>>(
// Expression.Block(new ParameterExpression[] { ret }, body),
// scope.RuntimeExpr,
// scope.ModuleExpr
//);
return moduleFun;
}
private AstGenerator(AnalysisScope.TopLevel global)
{
this.global = global;
this.engine = global.Engine;
this.scope = this.function = new AnalysisScope.Function(global, "module", true);
}
